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Methods and systems for utilizing waste sources of metal oxides

  • US 7,754,169 B2
  • Filed: 06/17/2009
  • Issued: 07/13/2010
  • Est. Priority Date: 12/28/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • a) contacting an aqueous solution with a source of metal oxides from a first industrial process;

    b) charging the aqueous solution with carbon dioxide from a source of carbon dioxide from the same or a second industrial process, wherein the source of carbon dioxide further comprises SOx, NOx, mercury, or any combination thereof; and

    c) subjecting the aqueous solution to precipitation conditions under atmospheric pressure to produce at least one carbonate-containing precipitation material, wherein the precipitation material comprises calcium carbonate, optionally in combination with magnesium carbonate, wherein the calcium carbonate comprises a precipitation material selected from the group consisting of aragonite, vaterite, and mixtures thereof.

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